104 FALCONID.E. 



are crossed by three dusky bars, one of which only is visible 

 above, which bars constitute the principal difference in appear- 

 ance between this species and the Hen Harrier. The primary 

 quill-feathers are black, the outer feathers of the tail are 

 barred ferruginous and white, the under surface of the wings 

 the same. The lower part of the breast, flanks, thighs, and 

 under-coverts of the tail are white, marked down the shafts of 

 the feathers with a stripe of bright ferruginous. 



In this species the third quill-feather is the longest in the 

 wing, and the ruff round the head is not so conspicuous as 

 in the Hen Harrier. 



The dark bird represented in the plate is a young male, 

 drawn from a specimen in the Zoological Museum, and is in 

 the plumage of the first year. The measurements taken from 

 this specimen are as follows : — the beak from the forehead ten 

 lines, from the gape eleven and a half lines ; the tarsus two 

 inches, three lines ; tail-feathers eight inches, two lines ; the 

 wing, from the carpus to the tip of the quill-feathers, thirteen 

 inches, six lines. 



Egg No. 20 belongs to this bird. 



